Display of cool effects of 448 digital tubes simulating water flow

Kinetic Digits is a mechanical flipping digital display, consisting of 448 7-segment digital tubes, simulating the effect of water flow. For various effects, it can be produced with the help of the provided host computer.

Schematic PCB

Zhihuijun's new work: Hanwen smart keyboard with FOC force feedback knob, multi-function, modular mechanical keyboard (schematic, firmware, etc.)

The keyboard uses a modular design. The multi-functional scene interaction module on the left can be replaced with various custom components. By default, a Dynamic component with an e-ink screen and FOC force feedback knob is used; the keyboard body uses a shift register method to implement the key scanning circuit; The module and keyboard body can be used alone, or they can communicate and call each other through the serial port protocol.

Schematic PCB

Make a USB-C power supply (understand the principles of USB-PD in depth, including schematics and English design instructions, etc.)

A simple power supply design based on USB-PD, USB-PD allows to provide voltage up to 20V (current up to 5A), the author shared his design details, you can have an in-depth understanding of the working principle of USB-PD.

Schematic PCB

Tah: Arduino-compatible BLE platform, which can be used as beacons, microcontrollers and HID devices (including schematics, source code, etc.)

Tah - Control anything from your smartphone, open source, Arduino-compatible Bluetooth Low Energy (BLE) platform that can be used as a beacon, microcontroller, and HID device.

Schematic PCB

Novena: an open source computer based on Freescale and Xilinx FPGA, designed for use as a desktop, laptop or standalone board

Novena is a 1.2GHz, Freescale quad-core ARM architecture computer tightly coupled with Xilinx FPGA. It is designed for users who care about free software and open source, and/or want to modify and extend their hardware: all documentation for the PCB is open and freely downloadable, the entire operating system can be built from source, and it Comes with a variety of features that facilitate rapid prototyping.

Schematic PCB

snapVCC: 3.3/5 V ultra-efficient voltage regulator that mounts directly on your 9 V battery (schematic, PCB, etc. included)

snapVCC is a highly portable and convenient power supply for your electronics projects. It's designed to fit a 9V battery and provide you with 3.3V or 5V power wherever you need it. What can you do with snapVCC? Many circuits require a regulated 3.3 or 5 volt power supply. 9V batteries are an easily available power option. A common method of using a 9V battery to power a circuit is to use a linear regulator IC circuit to step down the voltage.

Schematic PCB

Numato Opsis: FPGA-based open video platform

Numato Opsis is a powerful new FPGA-based open source video platform for videographers and visual artists. Opsis boards are designed to give users complete control over high-speed video, supporting everything from live meeting capture solutions to experimental visual art and even general FPGA-based video research.

Schematic PCB

Maker LED Display: Arduino programmable and internet-connected LED matrix display

Maker LED displays make using LED matrix displays easy. The ready-to-use, fully assembled circuit board has everything you need to run your monitor - just plug it in! Using and customizing the display is easy, with a specially written Arduino library and a dozen pre-made examples. The Maker LED display also has Wi-Fi so it can connect to the Internet to retrieve and display information. Choose between 32 x 9 pixel or 64 x 9 pixel versions and select LED color: white, blue, red, green, orange or violet.

Schematic PCB

Nixie Tap: Minimalist Wi-Fi Nixie Clock

Nixie Tap is a compact and simple Nixie clock. It's powered via a micro USB connector, so you can power it from any USB port or an old phone charger. It also has Wi-Fi, so it can automatically synchronize with an NTP time server once connected to a wireless network. We made the Nixie Tap look good on our desks, and we hope it looks good on yours.

Schematic PCB

HealthyPi v4 - Unplugged: Wireless, wearable, open source vital signs monitor powered by ESP32

Reliable health monitoring has traditionally required us to tether ourselves to machines that record our vital signs around the clock. However, outside of clinical settings this is rarely practical. We developed HealthyPi v4 in part to address this challenge. Building on its predecessor, HealthyPi v4 is a fully open source standalone vital signs monitor with wireless and wearable capabilities.

Schematic PCB

Dreamweaver 4N: Four-note sequencer (PCB, schematic, source code, etc.) for creating unique music in real time

Dreamweaver 4N is a four-note sequencer with potentiometers, allowing users to create their own unique music.

Schematic PCB

The Skull CTF: Guessing Skull Game Tool

The Skull is a Capture the Flag (CTF) puzzle that invites you to explore the innards of the AVR architecture. It has multiple stages that may keep you busy for days or even weeks as you flex your brain muscles and apply them to her riddles. Unless, of course, your mind loses its grip on reality and you fall into a swirling void of madness with no anchor. In this case, it may take you longer. To keep your head above water, you need three things: the ability to read and understand Arduino code, a willingness to spend some time reading the ATtiny45 datasheet, and basic programming skills.

Schematic PCB

USB Armory Mk II: Small Open Source USB Computer for Security Applications

The USB armory Mk II is a full-featured computer (900 MHz ARM® processor, 512 MB RAM, Bluetooth, USB-C) in a small form factor, designed from the ground up with information security applications in mind.

Schematic PCB

Inkplate 10: Low-power, easy-to-program, open-hardware e-paper display with Wi-Fi support and 9.7-inch screen

Inkplate 10 is a powerful, energy-efficient, Wi-Fi-enabled ESP32 development board with a recyclable 9.7-inch e-paper display. It's open hardware supported by open source software libraries, and it's easy to program whether you prefer MicroPython or the Arduino IDE.

Schematic PCB

Ant2 LiPo Charger: The smallest USB Type-C LiPo charger

The Ant2 is a tiny USB-C lithium polymer charger that measures just 16 x 9mm, just larger than the USB Type-C connector itself. It is the smallest charger in its class. Ant2 can be used to add USB-C power and battery charging support to space-constrained prototypes and projects. The small size also makes it easier to retrofit USB-C power into your old projects.

Schematic PCB

StereoPi v2: Open source stereo camera based on Raspberry Pi with Wi-Fi, Bluetooth and advanced power supply system (schematic, etc.)

StereoPi is an open source stereo camera based on Raspberry Pi. It can capture, save, live stream and process real-time stereoscopic video and images. StereoPi opens up countless possibilities in robotics, AR/VR, computer vision, drone instrumentation, panoramic video, and more.

Schematic PCB

PowerEver: the tiny device that turns your universal power bank into an uninterruptible power supply

PowerEver is a tiny electronic board that keeps your commercial power bank running uninterrupted while minimizing self-leakage current. It is user-adjustable and compatible with almost all power banks on the market. This means your power bank will never be short of power bank for your electronics.

Schematic PCB

SmartLED Shield for Teensy 4: Drive high-quality graphics to your HUB75 RGB matrix panel with Teensy4

Want to add lots of LEDs to your Arduino project? HUB75 RGB panels are a great way to do this as they are much cheaper than addressable Neopixel/WS2812 LEDs (typically 10% of the cost per LED). They are also available in a range of pixel densities (from 2mm to 10mm pitch) to better suit your project needs. However, using a microcontroller to display high-quality graphics on a HUB75 panel is complicated because the panel requires precise timing and constant refreshing of pixel data. That's where Teensy 4's SmartLED Shield comes in.

Schematic PCB

Gameduino 3X Dazzler: Arduino expansion board for gaming and audiovisuals with GPU, FPGA, HDMI and Python support

The Gameduino 3X Dazzler is an Arduino-compatible expansion board that outputs high-definition images and sound to any HDMI monitor or TV. Dazzler is great for game designers using Arduino or CircuitPython, makers who want rich, responsive data and text visualizations, and anyone who wants great visuals for their Arduino projects.

Schematic PCB

Data Fitness Connector (DFC): Allows Peloton bikes to communicate with fitness watches and other connectors (schematic, source code, PCB, etc.)

Data Fitness Connector (DFC) A data broadcaster is a device that allows Peloton bikes to communicate with fitness watches, head units, and apps, a feature not available on stock Peloton bikes. It reads power and cadence data in real time via a cable connected to the bike and broadcasts them wirelessly to nearby devices, including those built around non-Peloton platforms like Zwift and Garmin (see which products are supported). This allows you to enjoy the built-in features of your bike while taking advantage of features and services that rely on third-party platforms.

Schematic PCB